Cable assembly



May 13, 1941. H. G. WARNKE CABLE ASSEMBLY Filed sept. 9, 1938 ./1 'lill IIII (I 2Q ,y INVENTO.

BY ATTORNEY.'

' claimed.

Patented May 13, 1941 UNITED STATES PATENT OFFICE.

CABLE ASSEMBLY Hana G. Warnke, Detroit, Mich. Application lSeptember 9, 1938, Serial No. 229,095

6 Chinas.

Myvmvennon relates to a new' and usenu 1mprovement in a cable. assembly adapted primarily for use in connection with a welding gun electrically connected to a transformer.

With the conventional type of construction a pairof separate cables is used connecting from the transformer to the welding gun. In the use of such a connection manyundesirable features are encountered, among which is a lessening oi flexibility and the provision of alconstruction which is cumbersome and difilcult for the user to operate. It is quite customary where a pair of cables is used, that these cables be connected by suitable clamps but whether they are connected by clamps or not, there is a jerking of the cables which is eiIe Kecl upon the turning on oi' the current. Th connection of the cables together renders them more stiff and thus in turn lessens the flexibility. It h-as also been noted that in the use of separate cables, there is a considerable current loss and theV present invention is intended to increase the current capacity by eliminating this loss.

The present invention also is intended to aord a connection which is possessed of maximum flexibility, ease of handling and great durability. Y It is also the purpose of the present invention to provide a compact, emcient structure having the cables .water cooled and provided with such connections as to assure a watertight construction.

Otlfer objects will appear hereinafter.

The invention consists in the combination and arrangement of parts hereinafter described and The invention will be best understood by a reference to the accompanying drawing which forms a part of this speciilcation and in which,

Fig. 1 is'a side elevational view of the invention showing a connecting end with parts broken away and parts shown in section.

Fig. 2 is alongitudinal, vertical;` central, sectional view of the end of the invention opposite to that shown in Fig. elevation.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2. y In the drawing I have shown Fig. 1 separated into parts, the connection being indicated by the elongatedl arrow. In this view I have indicated the invention used with a transformer 1 projecting outwardly from which are the bosses 3 and 9 through which are extended the passages III and I I, respectively.

of the collar I3, is a metallic ltting I2.having a 1 with parts shown in side passage I3 formed therein through the fitting Il with the passage I5. Mounted on the fitting I2 is the L-shaped bracket I6 having an opening for reception of the bolt I1, the boss 3 connecting to one side of the secondary coil of the transformer, the boss 9 connecting to the opposite side of the secondary coil of the transformer and carrying the iitting I8 secured therethrough by the collar I9, this iitting III having a central passage 20 formed therethrough. v The welding gun illustrated is oi the conventional type carrying a pair of cooperating electrodes 2I and 22 which are usually formed hollow for the reception of water used for cooling purposes. A connector 23 is connected to the electrode 2| and a bracket 2l connected to the electrode 22 carries the metallic connector 25 through which the bolt 26may be extended.

In the construction illustrated, Iprovide a cen- -tral cable 21 formed from a metallic mesh or rubber or the like to provide a waterproof or insulated covering or sheathing for the cable 21. Embracing this rubber covering 3| is a tubular cable 32 formed from a wire mesh or weave which is fitted at one end over the tapered sleeve 33 projecting outwardly from the ntting 34, this Secured on the boss 3 by means tapered sleeve 33 being enclosed by the internally threaded neck 35 into which is threaded a jam nut 33 adapted for pressing the collar 31 onto the neck 33 and securing the cable 32 in close contact on the neck 33. This collar 31 has circumferentially spaced axially directed grooves 33 formed in its periphery.' The pipe I5 is connected by the iitting 39 in the pocket III leading into the channel II so that water may be conducted through the pipe I5 into the channel 4I and allowed to pass through `the grooves 33 into contact with the cable 32. Extending outwardly from the jam nut 361s a tubular neck l2 over which is secured one end of a flexible waterproof covering such as a hose 43 Vso that the water iiowing through the passage II may traverse the length of the hose 43 and serve to cool the cable 32. To prevent leakage of water at the periphery communicating or'sheathing of the covering 3l, I have provided a packing 44 pressedl by the jam nut 45 threaded into one face of the fitting 34. yThis fitting 34 is connected by means of the bolt l1 and the bracket i 6 to-the fitting I2 thus establishing a connection between the cable 32 and the other end of the secondary coil of the transformer.

Connection of these cables to the electrodes is made in a somewhat similar manner. The oppositeend of the cable 2i is provided with a bore 29 extending inwardly a short distance from one end thereof and this portion ci the cable being enclosed by a sheathing 3o', this end of the cable being securely connected to the iitting 23. A fitting 34 is provided through which the cable 2T and its flexible covering 3i project. This iitting 34 is provided with a tapered neck 33 over which is fitted the opposite end of the tubular cable 32 and held in position by means of the collar 31', pressed by the jam nut 36' threaded into the internally threaded collar 35 carried by the litting 34'. A neck 62 pro jects outwardly from the jam nut 36 and secured over this neck is the opposite end of the waterproof insulated covering or hose 43. A jam nut 4,5' threaded into one face of the fitting Bt serves to press the packing 44 so that leakage of water around the end of the waterproof insulated covering 3i may be prevented. This fitting 34 is electrically connected by means of the bolt 26-and the connection 25 to the electrode 22. The pipe 46 serves to conduct the water from the fitting 34' to the electrode 22. In this Way I provide a unitary structure in which one cable is embraced by the other so that the use of parallel separate cables is dispensed with and consequently, the disadvantages referred to are avoided. By having one cable embracing the other a more efficient economical structure is provided and one whichI is easily operatedand possessed of a maximum eiiiclency. The jerking of' the cable upon the turning on oi the current is eliminated and it is believed obvious that I have provided a very effective and simple means of connection at the opposite ends.

While I have illustrated and described the preferred form of construction, I do not wish to limit myseli tothe precise details of structure shown, but desire to avail myself of such varia tions and modlcations as may come within the scope oi the appended claims.

What I claim as new is:

1. An electrical connecting cable comprising a non-tubular conducting core; an insulating covering embracing said core in snug relation; a hollow conducting member embracing said insulating covering in snug relation; and another Y cover of insulation embracing said hollow conductor in spaced relation thereto to provide a water channel around said hollow conductor.

2. An electrical connecting device of the class described' comprising an elongated non-tubular electrical conducting core; a covering of insulation embracing said core and engaging the same in snug relation, said core projecting beyond the end of said insulation. a tubular electrical conducting member embracing said insulation in snug relation, said insulation projecting beyond the end of said tubular conducting member; and a layer of insulation embracing said tubular conducting member in spaced relation thereto, said tubular conducting member projecting beyond the end oi said last named layer of insulation.

3. An electrical conducting cable of the class described comprising a non-tubular electrical conducting core; a layer of insulation embracing said core, said core projecting beyond the end of said insulation: a tubular conducting member embracing said layer of insulation, said layer of insulation projecting beyond the end of said tubular conducting member and an outer layer of insulation embracing said tubular conducting member, in spaced relation thereto, said tubular conducting member projecting beyond the end of said outer layer of insulation.

4. In a device of the class described, a conducting cable comprising a non-tubular metallic electrical conducting core; a layer of insulation snugly embracing said core, said core projecting beyond the end of said insulation; and snug fitting tubular means embracing said projecting end oi said core, said means being impervious to liquid.

5. In a device of the class described, a conducting cable comprising a non-tubular metallic electrical conducting core; a layer of insulation snugly embracing said core, said core projecting beyond the end of said insulation; tubular means embracing said projecting end of said core, said means being impervious to liquid; a tubular electrical conductor embracing said layer of insulation, said insulation projecting beyond the end oi said tubular conductor; and an outer layer of insulation embracing said tubular conductor in spaced relation. said tubular conductor projecting beyond the end of said outer layer of insuiation.

6. An electrical connecting device of the class described comprising: an elongated cable embodying a non-tubular metallic core; a layer of insulation embracing said core in snug relation, said core projecting beyond the end of said layer of insulation; a. tubular conductor embracing said layer of insulation; said layer of insulation projecting beyond the end of said tubular conductor; an outer layer of insulation embracing said tubular conductor in spaced relation thereto; a fitting iixedly mounted on said first named layer of insulation adjacent the end thereof; means for connecting the end of said tubular conductor to said fitting: and means for connecting the end of said outer layer of insulation to said fitting, said fitting having passages therein communicating with the interior oi.' said outer layer of insulation for conducting a cooling iiuid into and from the space in said outer layer of insulation surrounding said tubular conductor.

HANS G. WARNKE. 

